Enantioselektive Katalyse, XVIII Der Einfluß nicht koordinierter Stereozentren auf die enantioselektive Hydrierung/Enantioselective Catalysis, XVIII The Influence of Non-Coordinated Stereocenters on the Enantioselective Hydrogenation
Optically active phosphine oxides. 5. P-chiral 2-aminoethyl phosphine oxides
作者:K.Michał Pietrusiewicz、Maria Zabłocka
DOI:10.1016/s0040-4039(00)82098-5
日期:1988.1
Homochiral 2-aminoethyl phosphineoxides are expeditiously prepared by thermal addition of primary and secondary amines to (−)-(S)-methylphenylvinylphosphine oxide. Their transformation into optically active 2-aminoethyl phosphines and 2-aminoethyl phosphinesulphides is exemplified.
Synthesis of enantiomerically pure styryl and dienyl phosphine oxides via Pd-catalyzed Heck coupling reaction
作者:K. Michał Pietrusiewicz、Maciej Kuźnikowski、Marek Koprowski
DOI:10.1016/s0957-4166(00)80060-9
日期:1993.10
Pietrusiewicz, K. Michal; Zablocka, Maria, Tetrahedron Letters, 1988, vol. 29, # 8, p. 936 - 940
作者:Pietrusiewicz, K. Michal、Zablocka, Maria
DOI:——
日期:——
Stereoselective nitrone additions to vinylphosphine derivatives: effect of phosphorus substituents on reaction diastereoselectivity
作者:Alberto Brandi、Stefano Cicchi、Andrea Goti、K. Michal Pietrusiewicz、Maria Zablocka、Witold Wisniewski
DOI:10.1021/jo00014a011
日期:1991.7
Meaningful diastereofacial selectivity in cycloaddition of 2,2-dimethyl-3,4-pyrroline N-oxide (DMPO) to 12 structurally diversified vinylphosphine derivatives 1-12 has been achieved by proper choice of the polar substituent on phosphorus combined with effective steric differentiation of the remaining substituents. The unique sense of induction in all these reactions is consistent with the assumption that vinylphosphorus dipolarophiles prefer an s-cisoid array of C = C - P = X fragments in their reactive conformations. Use of divinylphosphine derivatives in such reactions exemplifies the possibility of synthesizing chiral phosphine oxides and sulfides from prochiral precursors in a highly selective and stereochemically predictable manner. An observation that in P-31 NMR spectra the adducts of type I are uniformly found at lower field than adducts of type II facilitates the stereochemical assignments.
PIETRUSIEWICZ, K. MICHAL;ZABLOCKA, MARIA, TETRAHEDRON LETT., 29,(1988) N 16, 1991-1992